CN103241043B - Single-sided dust collection blackboard eraser - Google Patents
Single-sided dust collection blackboard eraser Download PDFInfo
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- CN103241043B CN103241043B CN201210027808.XA CN201210027808A CN103241043B CN 103241043 B CN103241043 B CN 103241043B CN 201210027808 A CN201210027808 A CN 201210027808A CN 103241043 B CN103241043 B CN 103241043B
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- wiping board
- housing
- blackboard
- wiping
- dust
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Abstract
The invention discloses a single-sided dust collection blackboard eraser. The single-sided dust collection blackboard eraser comprises a shell, a dust collecting slot which is arranged on the rear portion of the shell, a back plate, two erasing plates and a transmission mechanism. The two erasing plates are arranged side by side along the width direction of the shell, each of the erasing plates comprises an erasing plate body and a piece of felt fixed on the erasing plate body, the transmission mechanism is connected with the shell and the erasing plates respectively and drives the erasing plates to move left and right inside the shell together and to move alternately and vertically. The single-sided dust collection blackboard eraser can effectively eliminate gypsum dust flying during blackboard erasing and reduce gypsum dust floating in air greatly, thereby reducing the damage of the floating gypsum dust to the human body greatly as well as guaranteeing class quality.
Description
Technical field
The present invention relates to a kind of teaching tool, be specifically related to a kind of blackboard eraser.
Background technology
Chalk, blackboard and blackboard eraser are one group of traditional cultural spreading instruments, and are widely used in the public places such as school, community, company, even in part family, also have application.Using chalk-writing writing on the blackboard, is be coated on blackboard by gypsum powder; Blackboard eraser can be clean by the gypsum powder erasing on blackboard, thus can write new writing on the blackboard.
When blackboard wiping, Gypsum dust (chalk dust) to be kicked up by blackboard eraser and of short duration in atmosphere floating, and then fall object plane near blackboard and on the ground.Gypsum dust is very easily sucked in human body by people after being kicked up, thus works the mischief to health.The particle of Gypsum dust is about more than 100 microns.But according to labour health interrelated data, the dust particle of diameter more than 10 ~ 20 microns in air, when the inspiration of nostril, majority is stopped by vibrissa, nose, pharynx, throat, is attached to mucous membrane small airway and alveolar, thus has an impact to health.
The infringement that student and teacher are subject to chalk dust is particularly serious.A student is from least needing for 15 years to finishing college at primary school, and in gold period of growing at this section of physical growth, it is inevitably subjected to the invasion and attack of chalk dust ash; On teacher's slave station, dais needs the work time of about 40 years to retirement, and this more than half time in 40 years will be spent in chalk dust ash, and suffered harm is also well imagined.
In addition, the Gypsum dust of flying upward also can have influence on the quality of listening to the teacher of give lessons mood and the student of teacher.
Summary of the invention
The object of this invention is to provide a kind of one side blackboard rubber with suction for chalk powder, this blackboard eraser can suppress Gypsum dust (chalk dust) to be flown upward when erasing the board, thus significantly reduces the harm that floating Gypsum dust causes human body.
For achieving the above object, the invention provides a kind of one side blackboard rubber with suction for chalk powder, comprise a housing, dust accommodating groove and the backboard being fixed on housing afterbody; In addition, it also comprises:
One wiping board and a wiping board, the width along housing is arranged side by side, and wiping board all comprises a wiping board body and is fixed on the felt on wiping board body;
One transmission mechanism, is connected with housing and wiping board respectively, drives wiping board move left and right together in housing and alternately move up and down.
In the technical program, when blackboard eraser blackboard wiping, due to the effect of transmission mechanism, wiping board (hereinafter referred to as forward wiping board) forward in the movement direction can lift, simultaneously wiping board rearward (hereinafter referred to as wiping board rearward) can correspondingly be depressed in the movement direction, thus makes forward wiping board be in a high position, does not contact blackboard surface, and wiping board is in low level rearward, with blackboard surface contact.Therefore, the work of blackboard wiping completes primarily of wiping board rearward.In the process of blackboard wiping, the region that Gypsum dust is kicked up mainly concentrates in the region in wiping board front rearward, and this block region just in time cover by forward wiping board, therefore forward wiping board play stop Gypsum dust raise role.Gypsum dust drops in dust accommodating groove after being subject to the stop of forward wiping board, thus suppresses Gypsum dust in atmosphere floating.
Preferably, in above-mentioned one side blackboard rubber with suction for chalk powder, housing is arranged two crossbeams, transmission mechanism comprises:
Eight forks, its one end is connected on crossbeam symmetrically rotationally, and the other end is connected on wiping board body rotationally, and wiping board is distinguished can along a circular swing motion in housing;
Two of centre forks are linked together, thus realize the interlock between wiping board by two connecting rods rotationally.
When blackboard wiping, forward wiping board, under frictional force and fork effect, is rocked to a high position along camber line to the opposite direction of the blackboard eraser direction of motion, thus makes forward wiping board leave blackboard surface.The fork be connected with forward wiping board also rotates around its tie point be connected with crossbeam with the swing of forward wiping board.Two of centre forks link together by connecting rod rotationally, the rotation of the fork be therefore connected with forward wiping board can promote connecting rod, connecting rod promotes the fork be connected with wiping board rearward again, the tie point making it to be connected with crossbeam around it rotates, and drive rearward wiping board along circular swing motion to low level, thus make the felt on wiping board rearward and blackboard surface contact, the writing on the blackboard on blackboard wiping.
Preferably, in above-mentioned one side blackboard rubber with suction for chalk powder, also comprise:
A pair escapement bar, U-shaped, be connected to rotationally on housing in the middle of it, U-shaped two ends respectively connect a scroll wheel, and when the felt of side is in low level, the scroll wheel of opposite side is also in low level and is positioned in a plane with the felt of opposite side;
Four push rods, one end of each push rod is connected rotationally with the both sides of escapement bar respectively, and the other end is connected rotationally with wiping board body.
Be rocked in high-order process at forward wiping board, forward wiping board can produce a pulling force to connected push rod, thus escapement bar is rotated around its tie point be connected with housing, make the scroll wheel of forward wiping board homonymy to lower position, until with blackboard surface contact.Now, blackboard eraser is by the scroll wheel of forward wiping board homonymy and wiping board common support rearward.Scroll wheel can also make blackboard eraser move left and right more smooth and easy on blackboard, thus makes blackboard eraser be easier to use.
Alternatively, in above-mentioned one side blackboard rubber with suction for chalk powder, wiping board body is provided with some holddown grooves, has a slit passed through for dust between adjacent holddown groove; Institute's art felt is some vertical bar felts, is embedded in holddown groove.In the process of blackboard wiping, the felt that the Gypsum dust part that wiping board is kicked up rearward is subject on forward wiping board stops, falls in dust accommodating groove; Another portion can enter into blackboard eraser inside from the slit forward wiping board, and is subject to the stop of blackboard eraser housing and backboard, fall in dust accommodating groove, thus it is in atmosphere floating to significantly reduce Gypsum dust.
Alternatively, in above-mentioned one side blackboard rubber with suction for chalk powder, each wiping board body includes:
One wiping board housing, which is provided with some holddown grooves, and have a slit passed through for dust between adjacent holddown groove, felt is embedded in holddown groove;
The one wiping board backboard removably connected with wiping board housing, the tie point of fork and push rod and wiping board body is located on wiping board backboard, wiping board backboard is also provided with some slits corresponding with the slit on wiping board housing.
When felt wearing and tearing or after damaging, the wiping board housing that old felt is housed can be pulled down from wiping board backboard, be replaced with the wiping board housing that new felt is housed, thus the service life of blackboard eraser can be extended.
Preferably, in above-mentioned one side blackboard rubber with suction for chalk powder, the length of two connecting rods is less than or equal to the distance between tie point that middle two forks are connected with crossbeam.
Preferably, in above-mentioned one side blackboard rubber with suction for chalk powder, distance between the tie point that one end of two push rods is connected with wiping board is less than the distance between tie point that its other end is connected with escapement bar, thus when making wiping board move to a high position, the scroll wheel of the same side can be left behind to blackboard surface.
One side blackboard rubber with suction for chalk powder of the present invention can effectively suppress Gypsum dust to be flown upward when erasing the board, and significantly reduces Gypsum dust floating in air, thus has both significantly reduced floating Gypsum dust and work the mischief to human body, in turn ensure that the quality of attending class; In addition, blackboard eraser of the present invention can also change felt, thus extends the service life of blackboard eraser.
Accompanying drawing explanation
Fig. 1 is the structural representation of one side blackboard rubber with suction for chalk powder of the present invention under a kind of embodiment.
Detailed description of the invention
Below in conjunction with specific embodiment, explanation is further explained to one side blackboard rubber with suction for chalk powder of the present invention.
Fig. 1 shows one side blackboard rubber with suction for chalk powder of the present invention structure in the present embodiment.As shown in Figure 1, housing 1 afterbody is provided with dust accommodating groove 2, and its back is provided with a backboard, the back side of backboard covering shell 1 and dust accommodating groove 2.Housing 1 inside is provided with two wiping boards 3,4 and a group be arranged side by side along housing 1 width in order to connect the transmission mechanism of housing 1 and wiping board 3,4.Wherein, wiping board 3,4 includes a wiping board body 301 and some vertical bar felts 302, and wiping board body 301 comprises a wiping board housing 303 and a wiping board backboard 304 removably connected with wiping board housing 303; Wiping board housing 303 is provided with some holddown grooves, and have a slit passed through for dust between adjacent holddown groove, felt 302 is embedded in holddown groove; Wiping board backboard 304 is also provided with some slits corresponding with slit on wiping board housing 303; Transmission mechanism can drive wiping board 3,4 move left and right together in housing 1 and alternately move up and down, and in the present embodiment, transmission mechanism comprises eight forks 5 and two connecting rods 6; One end of eight forks 5 is symmetrical respectively and be connected to rotationally on two crossbeams 10 on housing 1, and its other end is connected on wiping board backboard 304 respectively rotationally, makes wiping board 3,4 respectively can along a circular swing motion in housing 1; Two of centre forks 5 link together by two connecting rods 6 respectively rotationally, thus realize the interlock between wiping board 3,4, and the length of connecting rod 6 is less than or equal to the distance between tie point that middle two forks 5 are connected with crossbeam 10.Housing 1 inside is also respectively provided with a U-shaped escapement bar 7 up and down, the centre of escapement bar 7 is connected with housing 1 rotationally, its U-shaped two ends respectively connect a scroll wheel 8, the both sides of each escapement bar 7 are also connected with one end of two push rods 9 respectively rotationally, the other end of push rod 9 is connected rotationally with wiping board backboard 304, and the distance between the tie point that is connected with wiping board 3,4 of one end of two push rods 9 is less than the distance between tie point that its other end is connected with escapement bar 7.
Please continue to refer to Fig. 1, when blackboard eraser is to left movement blackboard wiping, wiping board 3, under the effect of frictional force and fork 5, is rocked to a high position to the right along camber line, thus makes wiping board 3 leave the distance of blackboard surface about 2mm.The tie point that the fork 5 be connected with wiping board 3 is also connected with crossbeam 10 around it with the swing of wiping board 3 rotates.Two of centre forks 5 link together by connecting rod 6 rotationally, the rotation of the fork 5 be therefore connected with wiping board 3 can promote connecting rod 6, connecting rod 6 promotes the fork 5 be connected with wiping board 4 again, the tie point making it to be connected with crossbeam 10 around it rotates, and drive wiping board 4 along circular swing motion to low level, thus make the felt 302 on wiping board 4 and blackboard surface contact, the writing on the blackboard on blackboard wiping.Along with wiping board 3 is rocked to a high position to the right, it can produce a pulling force to connected push rod 9, thus the tie point that escapement bar 7 is connected with housing 1 around it rotates, and makes the scroll wheel 8 of wiping board 3 homonymy to lower position, until with blackboard surface contact.Now, blackboard eraser is by the scroll wheel 8 of wiping board 3 homonymy and wiping board 4 common support.Scroll wheel 8 can also make blackboard eraser move left and right more smooth and easy on blackboard, thus makes blackboard eraser be easier to use.In the process of blackboard eraser blackboard wiping left, the Gypsum dust part felt 302 be subject on wiping board 3 that wiping board 4 is kicked up stops, falls in dust accommodating groove 2; Another portion can enter into blackboard eraser inside from the twice slit the wiping board housing 303 of wiping board 3 and wiping board backboard 304, and is subject to blackboard eraser housing 1 and the stop of backboard, fall in dust accommodating groove 2, thus it is in atmosphere floating to significantly reduce Gypsum dust.
When blackboard eraser moves right blackboard wiping, the whole process of its blackboard wiping and its imitate to left movement phase, namely wiping board 4 is under the effect of frictional force and fork 5, is rocked to a high position left along camber line, thus makes wiping board 4 leave the distance of blackboard surface about 2mm.The tie point that the fork 5 be connected with wiping board 4 is also connected with crossbeam 10 around it with the swing of wiping board 4 rotates.Two of centre forks 5 link together by connecting rod 6 rotationally, the rotation of the fork 5 be therefore connected with wiping board 4 can promote connecting rod 6, connecting rod 6 promotes the fork 5 be connected with wiping board 3 again, the tie point making it to be connected with crossbeam 10 around it rotates, and drive wiping board 3 along circular swing motion to low level, thus make the felt 302 on wiping board 3 and blackboard surface contact, the writing on the blackboard on blackboard wiping.Along with wiping board 4 is rocked to a high position left, it can produce a pulling force to connected push rod 9, thus the tie point that escapement bar 7 is connected with housing 1 around it rotates, and makes the scroll wheel 8 of wiping board 4 homonymy to lower position, until with blackboard surface contact.Now, blackboard eraser is by the scroll wheel 8 of wiping board 4 homonymy and wiping board 3 common support.In the process of blackboard eraser blackboard wiping to the right, the Gypsum dust part felt 302 be subject on wiping board 4 that wiping board 3 is kicked up stops, falls in dust accommodating groove 2; Another portion can enter into blackboard eraser inside from the twice slit the wiping board housing 303 of wiping board 4 and wiping board backboard 304, and is subject to blackboard eraser housing 1 and the stop of backboard, falls in dust accommodating groove 2.
That enumerates it should be noted that above is only specific embodiments of the invention, obviously the invention is not restricted to above embodiment, has many similar changes thereupon.If all distortion that those skilled in the art directly derives from content disclosed by the invention or associates, protection scope of the present invention all should be belonged to.
Claims (6)
1. an one side blackboard rubber with suction for chalk powder, comprises a housing (1), and dust accommodating groove (2) and the backboard being fixed on housing (1) afterbody, characterized by further comprising:
One wiping board (3) and a wiping board (4), width along housing (1) is arranged side by side, the felt (302) that wiping board (3,4) all comprises a wiping board body (301) and is fixed on wiping board body; Housing (1) is arranged two crossbeams (10);
One transmission mechanism, is connected with housing (1) and wiping board (3,4) respectively, drives wiping board (3,4) move left and right together in housing (1) and alternately move up and down; Wherein, described transmission mechanism comprises: eight forks (5), and its one end is connected on crossbeam (10) symmetrically rotationally, and the other end is connected on wiping board body (301) rotationally; Two of centre forks (5) are linked together by two connecting rods (6) rotationally.
2. one side blackboard rubber with suction for chalk powder as claimed in claim 1, is characterized in that, also comprise:
A pair escapement bar (7), U-shaped, be connected on housing (1) rotationally in the middle of it, U-shaped two ends respectively connect a scroll wheel (8), when the felt (302) of side is in low level, the scroll wheel of opposite side is also in low level and is positioned in a plane with the felt (302) of opposite side;
Four push rods (9), one end of each push rod (9) is connected rotationally with the both sides of escapement bar (7) respectively, and the other end is connected rotationally with wiping board body (301).
3. one side blackboard rubber with suction for chalk powder as claimed in claim 2, it is characterized in that, described wiping board body (301) is provided with some holddown grooves, has a slit passed through for dust between adjacent holddown groove; Described felt (302) is some vertical bar felts (302), is embedded in described holddown groove.
4. one side blackboard rubber with suction for chalk powder as claimed in claim 3, is characterized in that, the length of two connecting rods (6) is less than or equal to the distance between tie point that middle two forks (5) are connected with crossbeam (10).
5. one side blackboard rubber with suction for chalk powder as claimed in claim 4, it is characterized in that, the distance between the tie point that one end of two push rods (9) is connected with wiping board (3,4) is less than the distance between tie point that its other end is connected with escapement bar (7).
6. one side blackboard rubber with suction for chalk powder as claimed in claim 2, it is characterized in that, described each wiping board body (301) includes:
One wiping board housing (303), which is provided with some holddown grooves, and have a slit passed through for dust between adjacent holddown groove, described felt (302) is embedded in holddown groove;
The one wiping board backboard (304) removably connected with wiping board housing (303), described fork (5) and push rod (9) are located on wiping board backboard (304) with the tie point of wiping board body (301), and described wiping board backboard (304) is also provided with some slits corresponding with the slit on wiping board housing (303).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210027808.XA CN103241043B (en) | 2012-02-08 | 2012-02-08 | Single-sided dust collection blackboard eraser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210027808.XA CN103241043B (en) | 2012-02-08 | 2012-02-08 | Single-sided dust collection blackboard eraser |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103241043A CN103241043A (en) | 2013-08-14 |
| CN103241043B true CN103241043B (en) | 2015-06-17 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210027808.XA Expired - Fee Related CN103241043B (en) | 2012-02-08 | 2012-02-08 | Single-sided dust collection blackboard eraser |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103241043B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2196302A (en) * | 1986-09-09 | 1988-04-27 | Chen Jin Sheng | Blackboard eraser |
| CN2108634U (en) * | 1990-09-10 | 1992-07-01 | 王昕� | Eraser with automatic absorbing chalk dust |
| CN2376387Y (en) * | 1999-05-20 | 2000-05-03 | 俞渤仁 | Dust-collecting blackboard eraser |
| JP2000238495A (en) * | 1999-02-23 | 2000-09-05 | Masao Tanaka | Eraser |
| CN202428945U (en) * | 2012-02-08 | 2012-09-12 | 俞渤仁 | Single-sided dust collecting blackboard eraser |
-
2012
- 2012-02-08 CN CN201210027808.XA patent/CN103241043B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2196302A (en) * | 1986-09-09 | 1988-04-27 | Chen Jin Sheng | Blackboard eraser |
| CN2108634U (en) * | 1990-09-10 | 1992-07-01 | 王昕� | Eraser with automatic absorbing chalk dust |
| JP2000238495A (en) * | 1999-02-23 | 2000-09-05 | Masao Tanaka | Eraser |
| CN2376387Y (en) * | 1999-05-20 | 2000-05-03 | 俞渤仁 | Dust-collecting blackboard eraser |
| CN202428945U (en) * | 2012-02-08 | 2012-09-12 | 俞渤仁 | Single-sided dust collecting blackboard eraser |
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| Publication number | Publication date |
|---|---|
| CN103241043A (en) | 2013-08-14 |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150617 Termination date: 20200208 |